From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F8E1C433F5 for ; Sun, 26 Dec 2021 17:22:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230502AbhLZRWS (ORCPT ); Sun, 26 Dec 2021 12:22:18 -0500 Received: from mta-tor-003.bell.net ([209.71.212.30]:16304 "EHLO cmx-torrgo002.bell.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230484AbhLZRWR (ORCPT ); Sun, 26 Dec 2021 12:22:17 -0500 X-RG-CM-BuS: 0 X-RG-CM-SC: 0 X-RG-CM: Clean X-Originating-IP: [67.71.8.137] X-RG-Env-Sender: dave.anglin@bell.net X-RG-Rigid: 61C7809F00121B61 X-CM-Envelope: MS4xfLD65poLiV36KJhJvtyPT7bscP2+WsXg2pSQftamVmdW7pCS8UJ0a4B9RlRiG1ehWK2WjC3KsQ9eo5LmOYL8ggeDbMs1qaSQKYIW6J/WkaA4k9GyVW9h P+6jTwA51mYFf3+Y+kUW6OP+BcUhGQQWsbNZc+rZY6FHUUHPeWQjfA7FB+cg1G09mke1TqSP7MaiazR9qL+ZFXk8hU9DwmC5FA9aSVRP+wQyo0UxdmKhvFQ6 lQjx5HmcHUVHdSYneIj06aHPWHQlQBKt0QNNcsLBrIBA2g0Z8yoSfIxKq6xVrxcT X-CM-Analysis: v=2.4 cv=W7Vb6Tak c=1 sm=1 tr=0 ts=61c8a4c3 a=jrdA9tB8yuRqUzQ1EpSZjA==:117 a=jrdA9tB8yuRqUzQ1EpSZjA==:17 a=IkcTkHD0fZMA:10 a=FBHGMhGWAAAA:8 a=KK8sOFBPj50ue7zwYMEA:9 a=QEXdDO2ut3YA:10 a=9gvnlMMaQFpL9xblJ6ne:22 Received: from [192.168.2.49] (67.71.8.137) by cmx-torrgo002.bell.net (5.8.716.03) (authenticated as dave.anglin@bell.net) id 61C7809F00121B61; Sun, 26 Dec 2021 12:22:11 -0500 Message-ID: Date: Sun, 26 Dec 2021 12:22:12 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.4.1 Subject: Re: pagefaults and hang with 5.15.11 Content-Language: en-US To: Rolf Eike Beer , linux-parisc@vger.kernel.org References: <11891682.O9o76ZdvQC@daneel.sf-tec.de> From: John David Anglin In-Reply-To: <11891682.O9o76ZdvQC@daneel.sf-tec.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On 2021-12-26 11:21 a.m., Rolf Eike Beer wrote: > [139181.966881] WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter.constprop.0+0x8c/0x98 This is probably not reproducible. You might try this change from Sven diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index cf92ece20b75..0cd97fa004c5 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -228,11 +228,13 @@ static inline void  send_IPI_allbutself(enum ipi_message_type op)  {         int i; - + +       preempt_disable();         for_each_online_cpu(i) {                 if (i != smp_processor_id())                         send_IPI_single(i, op);         } +       preempt_enable();  }  #ifdef CONFIG_KGDB and my "[PATCH v3] parisc: Rewrite light-weight syscall and futex code" change. Page faults in the LWS code can mess up scheduling. I haven't found 5.15.11 to be stable. Dave -- John David Anglin dave.anglin@bell.net